第192回講演会 - Hiroshima University

第１９２回講演会
【開催：２０１６年２月２日（火）】
主催
中国地区化学工学懇話会，
CREST「多様な水源に対応できるロバストRO/NF膜の開発」
下記の要領で講演会を開催します。多数の方のご参加を頂きますようお願い致します。
記
日時： 2016年2月2日（火）１6：00～17:00
場所：広島大学工学部１１２講義室
交通：山陽本線西条駅下車、バス15 分、大学会館前下車
山陽新幹線東広島駅下車、タクシー10 分
広島バスセンターから直行バス約１時間、大学会館前下車
講演：An Approach to Prepare HF PVDF based MF, UF & NF Membranes for Clean Water
講師： Professor Xiao-Lin WANG (清華大学・化学工学科教授・王暁琳)
Department of Chemical Engineering, Tsinghua University, Beijing 100084, P.R. China
講演内容：Polyvinylidene fluoride (PVDF) hollow fiber (HF) Microfiltration (MF) membranes were firstly
prepared via thermally induced phase-separation (TIPS) method, where diphenyl carbonate (DPC) and diphenyl
ketone (DPK) were used as primary diluents. The liquid - liquid phase-separation phenomena were found and
the monotectic points of PVDF/DPC and PVDF/DPK systems appeared at PVDF concentration approximately
30 and 56 %(wt), respectively. The effects of polymer concentration and quenching temperature on the pore
structure, porosity and tensile strength of the membranes were also investigated. Secondly a novel HF PVDF
based ultrafiltration (UF) membrane was prepared by forming a thick poly(sulfobetaine) (PSB) layer on the
hollow fiber PVDF MF membrane. The PVDF based polySB UF membrane has sieving effects with the
MWCO of 5.2 µm and 85~105 kDa, respectively, which contributed to the greatly improved hydrophilicity,
membrane strength and thermal property. The another way to prepare a HF PVDF based UF membrane was
forming a thick polyethersulfone (PES) outer layer by using the non-solvent induced phase separation (NIPS)
method. Thirdly Nanoparticles (NPs) reinforced thin-film composite (TFC) membranes containing a range of
50~200 nm nanoparticles [MWCNTs, GOs, LTA zeolites] in a polypiperazine-amide (PA) thin film layer were
synthesized via sequential interfacial polymerization on PES/PVDF hollow fiber substrates. The
hydrophilization process of the NPs was conducted to ensure the homogenous dispersion in the aqueous phase
containing piperazine prior to the interfacial reaction, and their morphologies in the PA layer were confirmed by
FT-IR spectroscopy, SEM, EDX, XPS, and TEM. For all the NPs reinforced TFC membranes, the water flux
increased significantly. The separation performances of the monovalent and divalent ions of NaCl/Na2SO4
solutions were conducted. Finally a novel thin film nanocomposite (TFN) hollow fiber membrane was
fabricated comprising the sulfobetaine polymer functionalized multiwalled carbon nanotubes (ZCNT). The
TFN(ZCNT) hollow fiber membrane had much narrower pore sizes than TFN(CNT) hollow fiber membranes,
which was due to the grafting PSB layer at the end of the open-mouth-ended CNTs. By increasing the chain
length of PSB, the TFN(ZCNT) hollow fiber membrane showed simultaneously improved water permeability
and separation capacity of dextrans and electrolytes.
（日本語でのディスカッション可）
参加費：無料
申込先：FAX または電子メールでお申し込み下さい。
中国地区化学工学懇話会
TEL: 082-424-7718， FAX: 082-424-5494，E-mail: ysasa＠hiroshima-u.ac.jp

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